Topic: Adjective (বিশেষণ),

Best Answer Explained in Below-:

The word "proportionate" is an adjective because it describes a characteristic or quality of a noun, specifically indicating a relationship of size, amount, or degree between two or more entities. In English, adjectives serve to modify nouns, providing information about aspects such as appearance, quantity, or relationship. In the case of "proportionate," it often conveys the idea of balance or equivalence, suggesting that something corresponds in size or degree to something else.

For example, in the phrase "a proportionate response," the word "proportionate" describes the nature of the response, indicating it is appropriate or commensurate in relation to the stimulus. This usage underscores its function as an adjective, as it directly modifies and adds meaning to the noun "response."

In contrast, the other options provided—noun, adverb, and verb—do not align with the grammatical function of "proportionate." A noun would refer to a person, place, or thing; an adverb typically modifies verbs, adjectives, or other adverbs; and a verb describes an action or state of being. Therefore, the correct classification of "proportionate" is as an adjective (option C).